Motor-manifold-locking device.



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MOTOR MANIFOLD LOCKING DEVICE. APPLICATION FILED MAY 2s,-I9I7.

,6.56. A v Patented Sept. 24, 1918.

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CHARLES E. COCHRANE AND SAMUEL F. MCGREW, OF DENVER, COLORADO.

MOTOR-MANFOLDeLOCKING DEVICE.

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Specication of Letters Patent.,

atented Sept. 2e, 1918.

Application tiled May 28, 1917. Serial No. 171,226.

T o all whom 'it may concern Be it known that we. CHARLES E. Coon- RANE and SAMUEL F. McGnnw, citizens o't` the United States, residing at the city and county ot' Denver and State -of Colorado, have invented certain new and useful 'lmprovements in Motor-"vanitold-Loeking Devices; and we. do declare the following to be a full, clear, and exact description ot' the invention, such as will enable others .skilled in the art. to which it appcrtains .to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part. of this specification.

Our invention relates to means `for cutting oil' .the explosive mixture from the intake manifold ot internal combustion engines, in order to Yprevent an unauthorized person from operating the engine and stealing the automobile with which the engine is equipped. ln our improvement we locate a cut-ott' in the conduit between the carbureter and the intake manifold` the construction being such that the cut-od may be locked in position to prevent the passage ot' the explosive mixture from the earbureter to the intake 'iiianitolth whereby it is necessary to have a key to unlock the cuteoii. ny suitable lock of ordinary construction may be employed for this purpose. The regular Yale tumbler lock or a lock ot any other suitable construction may be employed since. our device is adapted for use with various types ot locks.

Having briefly outlined our improvement,

we will proceed to describe the same in detail, reference being made to the accompanying drawing in which is illustrated an em bodiment thereof. In this drawing Figure 1 is a section taken through the hoodand one of the cylinders of an internal combustion engine, our improved cut-oill being arranged in coperative relation with the carburetor and manifold.

Fig. 2 is a section taken through the conduit where our improvement is located, the

latter being also shown in section. The section 1s taken'on the line '2-3 Fig. 1, the parts, however, being shown on a "much larger scale.

Fig. 3 is a detail view similar to Fie'. 2 showing the valve memberclosed. The same reference-characters indicate the same parts in allVV the views. Let the nu moral 5 designate an internal combustion engine; 6 one of the cylinders thereof; 8 the crank case; 9 the intake manifold; 10 the carburetor and 12 the hood. 1n the conduit 13 which connects the earbureter with the intake manifold, we locate a cut-off valve 14 of suitable construction. 1n the drawing an ordinary butteriy or disk valve is illustrated though it must be understood that the invention is not limited to any specitio construe tion of valve piece as various modifications of this feature may be employed wit-hout in any' way departing from the spirit ot' the invention. The conduit 13 is provided with an opening which extends half way around the same, and this opening is closed by the expanded semi-cylindrical extremity 15 of a hollow cylindrical member 16 which extends outwardly from the conduit at right angles thereto. This semi-cylindrical part 15, is fitted tothe edge of the couduit'which surrounds the opening in the latter, and brazed or soldered in place as shown at 17 s o that it may be removed and attached at will. rEhe ditticulty, however, and the tools required in order to ett'ect such removal, are such that it will be hardly practicable for an automobile thief to resort to this act; but it he should succeed in removing the device, the opening in the Iconduit 13l is so large that the intake of air would make it impossible for a. suiiciently rich explosive mixture to enter the cylinders of the engin-e to produce explosions. Hence our improved lock is a perfect safeguard against automobile thefts.

l Connected with the valve piece or .cut-ott 1t as shown at 18, is a stem 19 whose inner extremity is enlarged to form a plug 20 which closely tits within the. member 16, in order to prevent the passage of the explosive mixture around the disk or valve piece' when the/latter is in the closed position. The outer extremity of the stem 19 is also enlarged as shown at 21 to titclosely within the member 1G. the latter being interiorly shouldered as shown at 22 in order to prevent the removal of the stem through the outer open extremity of the member 16. Between the enlargement 21 and the shoulder is a gasket 23 which forms a tight joint. Connected with the enlargement 21 by means of projections 2% 1s the barrelf 2-5 of it suitable lock, said barrell passage of the explosive mixture from the carbureter to the intake of the engine. The lock barrel is held in place Within the outer portion of the member 1G by means of a pin 29 which is passed through a segment of the member 1G, and engages a circumferential groove 30 formed in the lock barrel, thus alloiving the latter to rotate within the member 16, but preventing its removal.

lt will thus be understood that the stem 19 is connected with the valve-piece or cut'off 1l, and is so arranged ivithin the cylindrical member 16 that the explosive mixture may be eii'ectually cut off from the intake of the engine when the valve piece 14 is properly adjusted. ln the drawings this valve pieceis shown in the normal position or in position to allow the explosive mixture to pass freely from the carburetor, through the conduit 13 to the intake. lVlien however, the oivner of the automobile equipped *with our improvement leaves the same, he ivill insert the key 27 into the lock barrel and rotate the latter sufficiently to cause the l .valve piece or cut-od 14. to assume the horizontal posit-ion Within the conduit 13, after 1 which he will remove the key and the cut-ofi will be locked in position to prevent the passage of the explosive mixture to the intake of the engine hence no use can be made ofthe engine and the automobile is safe from theft. v

As illustra-ted in the drawing, the hood 1Q is provided on the side adjacent our improvement with an opening 31 through Which the key 2? may be inserted for the purpose of operating the cut-olf either for locking or unlocking purposes. This opening is pref erably normally closed by an adjustable cover 32 which may be pivoted or hinged in such a manner as to normally maintain its position of adjustment, thus preventing dust or dirt of anykind from entering the key- ,liole of the lock.

Attention is called to the fact that the conduit 13 is provided with a recess 33 Which receives a pointed or rounded part 34 formed on the valve piece 14, whereby the latter is accurately held in place Within the conduit.

Having thus described our invention, What We Claim is:

1. In a motor manifold locking device, the combination with a conduit in communication with the intake manifold of an internal combustion engine, said conduit having a relatively large side opening formed b v removal of a portion of the conduit Wall, of a cut-oft valve located in said conduit, a tubular member united to said conduit by means of fusible metal to close said opening, a, lock located in said tubular member, and an operative connection bctiveensaid lock and said cut-oit.

2. ln a deviceof the class described the combination with a conduit in communication with the intake manifold of an internal combustion engine, said conduit having a relatively large side opening formed by removal of a portion of the conduit ivall. of a cut-oli located in said conduit, a tubular member brazed to said conduit to close said side opening, a lock located in said tubular member, and an operative connection betn'een said lock and said cut-off.

3. The combination with a conduit for the passage of fluid to an internal combustion engine, said conduit having a relatively large side opening, a cut-off member arranged within said conduit, a tubular member having its extremity expanded and brazed to the conduit to close such side opening, a lock located in said tubular member and a rotary stein connecting the lock and' the cut-oft' member.

4. The combination with a conduit for the passage of fluid to an internal combustion engine, said conduit having a. relatively large side opening, a cut-off member ar- `anged Within said conduit, a tubular member having its inner extremity expanded and brazcd to the conduit to close such side opening, a lock located in said tubular member and a rotary stem connecting the lock and the cut-ofi member, the inner extremity of Said stein consisting of a plug which tightly closes the tubular member adjacent to the conduit.

`form a semi-cylindrical part adapted'r to close said opening in the conduit and bra-Zed to the latter Wherebyitis attachable and detachable, a loc-k within said tubular meinber, and an operative connection between said lockand the cutoff member.l f/

6. In a device of the class described the combination with a conduit in communica-V tion with the intake manifold of an inter-f' nal combustion engine, said conduit having a relatively large 'sideopening formed by removal of a portion of the rconduit Wall, of

a cut-off located in said conduit, a tubular member soldered to said conduit to close said side opening, a lock located in said tubular member, and .an operative ,connection be` tween said lock and said cut-off. In testimony whereof we aiiix our signatures.

cuantas E. cociiaaiiii.y SAMUEL r. MCGREW. 

